Word Finder - transmitter

definition

One who or that which transmits something (in all senses).

definition

An electronic device that generates and amplifies a carrier wave, modulates it with a meaningful signal derived from speech, music, TV or other sources, and broadcasts the resulting signal from an antenna.

At first it was usual to join the microphone transmitter in the direct circuit.

The earliest instrument of this kind was the Hunnings transmitter, patented in 1878.

It was found that to achieve this result the transmitter must be so constructed as to send out prolonged trains of slightly damped waves.

It is obvious that this apparatus might be used either as a transmitter or as a receiver, but that the effects must under ordinary circumstances be in either case extremely feeble.

This seems to have been the first transmitter in which it was proposed to use the resistance at the contact of two conductors.

Almost simultaneously with Berliner, Edison conceived the idea of using a variable resistance transmitter.

When the sounding board was spoken to or subjected to sound-waves, the mechanical resistance of the loose electrode, due to its weight, or the spring, or both, served to vary the pressure at the contact, and this gave to the current a form corresponding to the sound-waves, and it was therefore capable of being used as a speaking-telephone transmitter.'

In the Ader transmitter as many as twelve carbon pencils were employed, arranged in a series of two groups with six pencils in parallel in each group. These were supported at their ends in parallel carbon bars, which were carried by a nearly horizontal wooden diaphragm.

The chief difficulty with this transmitter, and with various others of later date based upon it, has been the frequent packing of the carbon granules, which renders the instrument inoperative.

The conditions permit of the circulation of the alternating currents of low periodicity, which are used for operating the bells, but in respect of the battery the circuit is open until the subscriber lifts the receiver, when the hook switch, thus released, joins the transmitter with one winding of an induction coil in series across the circuit.

We incur the added expense to protect the transmitter in a sturdy housing machined from aircraft aluminum.

Transmitter Small sealed units that contain the electronic circuitry needed to produce radio signals.

Brain waves can be measured by implanting a small radio transmitter device into a rat that sends data to an external recorder.

Fitted to the aircraft is a microwave downlink transmitter.

Connections shown in red have an excitatory effect on target structures (primarily through the transmitter glutamate ).

The transmitter loaded into the wire with just a series inductor for matching.

My neighbor is a tv transmitter mast; lovely tv reception!

The remote control system, comprising the keypad, transmitter. infra-red link, amplifier and control microcomputer.

Several companies made small spark-gap transmitter unit to send Morse up to a 200 feet range for such experimenters.

A small oscilloscope was built into the transmitter to aid with alignment and set-up the operation of the PA stages.

The alert units typically have a base that sits in the house and a transmitter in the form of a bracelet or necklace.

Then it sends these digital signals to a transmitter worn behind the ear.

A magnet holds the transmitter in place through its attraction to the receiver-stimulator, a part of the device that is surgically attached beneath the skin in the skull.

The receiver picks up digital information forwarded by the transmitter and converts it into electrical impulses.

After about a month, the surgical wounds will have healed, and the child returns to the implant clinic to be fitted with the external parts of the device (the speech processor, microphone, and transmitter).

With a transmitter that can reach up to 200 nautical miles, the Breitling Emergency Mission could save your life.

The different styles available include the Emergency, which has a built-in micro transmitter that broadcasts on 121.5 MHz aircraft emergency frequency.

In addition to its distinctive styling, the watch has a built in transmitter.

The transmitter, when activated, will alert rescue authorities in case of an accident.

With its in built micro transmitter, you can just imagine giving this to James Bond.

The built in micro transmitter broadcasts on the 121.5 MHz aircraft emergency frequency.

If a pilot is to crash land an airplane, he is able to activate the micro transmitter which will alert search and rescue.

The micro transmitter is activated by removing a cap on the watch which releases an antenna.

It is very important to note that the radio transmitter should not be set off in error.

The apparatus for generating the electric action at one end is commonly called the transmitting apparatus or instrument, or the sending apparatus or instrument, or sometimes simply the transmitter or sender.

It consists in punching, by means of " a puncher," a series of holes in a strip of paper in such a way that, when the strip is sent through another instrument, called the " transmitter," the holes cause the circuit to be closed at the proper times and for the proper proportionate intervals for the message to be correctly printed by the receiving instrument or recorder.

The side rows of holes only are used for transmitting the message, the centre row being required for feeding forward the paper in the transmitter.

This slip is then passed through a transmitter fitted with brush contacts and connected to the two line wires of a metallic loop. One circuit is formed by the loop itself, and a second, quite independent, by the two wires in parallel, earthed at each end.

The messages in the form of perforated tape are then passed through an automatic transmitter, something like a Wheatstone transmitter, at a speed of about 100 words a minute.

The slips are passed through an ordinary Wheatstone transmitter and actuate Wheatstone receiving apparatus which in turn controls a " Creed receiving perforator."

In the Rowland multiple method of telegraphic working, the transmitter consists of a mechanical keyboard provided with a series of levers, which effect certain combinations of positive and negative currents for each letter.

Each transmitter is therefore able to transmit a separate series of positive and negative currents in different combinations; these are distributed, by suitably arranged distributors and relays at the receiving end of the line, into their respective receivers.

The function of the " combiner " in each receiving instrument is so to group the received combination of positive and negative currents that they operate polarized relays in such a manner that the position of the tongues corresponds with the operation of the levers on the transmitter.

By means of this " light-relay " the intensity of the light acting at any moment upon the sensitized paper is made proportional to the illumination of the selenium in the transmitter.

To eliminate the sluggish action of the selenium transmitter a selenium cell similar to that at the transmitting station is arranged at the receiving apparatus, and exposed to precisely similar variations of light, the arrangement being such that the lag of this cell counteracts the lag of the transmitting cell.

Owing to the difficulty of maintaining perfect balance on duplexed cables, curb sending is not now used, but the signals are transmitted by means of an apparatus similar to the Wheatstone automatic transmitter used on land lines and differing from the latter only in regard to the alphabet employed; the signals from the transmitter actuate a relay having heavy armatures which in turn transmit the signals to the cable; this arrangement gives very firm signals, a point of great importance for good working.

By a modification of this apparatus the message, instead of being immediately re-transmitted into the second cable, can be punched on a paper slip, which can be inserted in the usual way into an automatic transmitter, so as to send either cable or Morse signals.

In circuit with this battery was placed the secondary circuit of an induction coil, the primary circuit of which contained a telephone transmitter or microphone interrupter.

In conjunction with the above receiver he employed a transmitter, which consisted of a large induction or spark coil S having its spark balls placed a few millimetres apart; one of these balls was connected to an earth FIG.

This receiving apparatus, with the exception of the Morse printer, was contained in a sheet-iron box, so as to exclude it from the action of the sparks of the neighbouring transmitter.